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h8300.c (h8300_emit_stack_adjustment): Don't generate insns by hand.

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* config/h8300/h8300.c (h8300_emit_stack_adjustment):
	Don't generate insns by hand.

From-SVN: r77954
This commit is contained in:
Kazu Hirata 2004-02-17 17:12:15 +00:00 committed by Kazu Hirata
parent d150ccef51
commit 72b1de442d
2 changed files with 18 additions and 6 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2004-02-17 Kazu Hirata <kazu@cs.umass.edu>
* config/h8300/h8300.c (h8300_emit_stack_adjustment):
Don't generate insns by hand.
2004-02-17 Andrew Pinski <pinskia@physics.uc.edu>
PR c++/14178

19
gcc/config/h8300/h8300.c
View File

@ -370,6 +370,10 @@ byte_reg (rtx x, int b)
static void
h8300_emit_stack_adjustment (int sign, unsigned int size)
{
/* If the frame size is 0, we don't have anything to do. */
if (size == 0)
return 0;
/* H8/300 cannot add/subtract a large constant with a single
instruction. If a temporary register is available, load the
constant to it and then do the addition. */
@ -378,11 +382,10 @@ h8300_emit_stack_adjustment (int sign, unsigned int size)
&& !h8300_current_function_interrupt_function_p ()
&& !(current_function_needs_context && sign < 0))
{
rtx new_sp;
rtx r3 = gen_rtx_REG (Pmode, 3);
emit_insn (gen_rtx_SET (Pmode, r3, GEN_INT (sign * size)));
new_sp = gen_rtx_PLUS (Pmode, stack_pointer_rtx, r3);
emit_insn (gen_rtx_SET (Pmode, stack_pointer_rtx, new_sp));
emit_insn (gen_movhi (r3, GEN_INT (sign * size)));
emit_insn (gen_addhi3 (stack_pointer_rtx,
stack_pointer_rtx, r3));
}
else
{
@ -390,8 +393,12 @@ h8300_emit_stack_adjustment (int sign, unsigned int size)
splitter. In case of H8/300, the splitter always splits the
addition emitted here to make the adjustment
interrupt-safe. */
rtx new_sp = plus_constant (stack_pointer_rtx, sign * size);
emit_insn (gen_rtx_SET (Pmode, stack_pointer_rtx, new_sp));
if (Pmode == HImode)
emit_insn (gen_addhi3 (stack_pointer_rtx,
stack_pointer_rtx, GEN_INT (sign * size)));
else
emit_insn (gen_addsi3 (stack_pointer_rtx,
stack_pointer_rtx, GEN_INT (sign * size)));
}
}